from the account page:
Guild Wars 2: Limited Time Exclusive Gift
If you’re subscribed to our newsletters as of April 29, 2019 , you will receive an exclusive Glowing Purple Mask skin.* Only available to subscribers, this in-game cosmetic item will give your Guild Wars 2 character mysterious, glowing purple eyes when applied to a piece of head armor.
Edit your newsletter preferences below to be eligible for the gift.
- Allow 8 weeks after April 29, 2019 for this item to be distributed."
link:
https://account.arena.net/settings
- Go to the link and login
- Enable all three newsletters
- Go to your email and open the ‘Guild Wars 2 Mailing List – Requires Confirmation’ email
- Click the ‘Confirm Your Subscription’ link